ISO 4217 specifies the structure for a three-letter alphabetic code and an equivalent three-digit numeric code for the representation of currencies and funds. For those currencies having minor units, it also shows the decimal relationship between such units and the currency itself.

ISO 4217:2008 also establishes procedures for a Maintenance Agency, and specifies the method of application for codes.

ISO 4217:2008 is intended for use in any application of trade, commerce and banking, where currencies and, where appropriate, funds are required to be described. It is designed to be equally suitable for manual users and for those employing automated systems.